Inventor · disambiguated record
Hans-Werner Stephan
Also filed as: STEPHAN HANS · STEPHAN HANS W · STEPHAN HANS-WERNER
19 granted patents·169 citations·filing 1974–1995
94Inventor score
Top patents by PatentIndex Score
19 records- 0190US4163760AContinuous production of organic phosphinesHOECHST AG·Filed 1978·Granted Aug 7, 1979·24 cites·12 claims
- 0282US3978195AProcess for the production of substantially water-insoluble linear ammonium polyphosphatesHOECHST AG·Filed 1974·Granted Aug 31, 1976·23 cites·1 claims
- 0371US4554368AContinuous process for the preparation of alkyltin thiocarboxylic acid estersCIBA GEIGY CORP·Filed 1982·Granted Nov 19, 1985·8 cites·13 claims
- 0469US4916907AMagnetocaloric monostable and bistable inductors for electrical energy and refrigerationMUNK HEINZ·Filed 1988·Granted Apr 17, 1990·46 cites·20 claims
- 0569US4731448AProcess for the preparation of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinolCIBA GEIGY CORP·Filed 1986·Granted Mar 15, 1988·11 cites·15 claims
- 0661US4078023AProduction of O,O-dialkylthionophosphoric acid chloridesHOECHST AG·Filed 1976·Granted Mar 7, 1978·5 cites·9 claims
- 0757US4530769AProcess for separating carbon black from an aqueous suspensionHOECHST AG·Filed 1983·Granted Jul 23, 1985·9 cites·2 claims
- 0854US3931294AProduction of 2-phenyl-ethylene phosphonic acidHOECHST AG·Filed 1974·Granted Jan 6, 1976·3 cites·3 claims
- 0948US4757156AProcess for making tertiary alkylphosphinesHOECHST AG·Filed 1987·Granted Jul 12, 1988·4 cites·9 claims
- 1047US4273752AProcess for making red phosphorusHOECHST AG·Filed 1980·Granted Jun 16, 1981·6 cites·6 claims
- 1143US4517163AProcess for making titanium dioxide concentratesHOECHST AG·Filed 1983·Granted May 14, 1985·5 cites·5 claims
- 1237US4355010AProcess for removing phosphorus in vapor form and phosphanes from gas mixturesHOECHST AG·Filed 1980·Granted Oct 19, 1982·6 cites·4 claims
- 1337US4278647AProduction of phosphorous acidHOECHST AG·Filed 1979·Granted Jul 14, 1981·3 cites·8 claims
- 1435US4402812AElectrolytic cellHOECHST AG·Filed 1982·Granted Sep 6, 1983·3 cites·7 claims
- 1534US5531075AProcess to transport acetyleneMESSER GRIESHEIM GMBH·Filed 1994·Granted Jul 2, 1996·7 cites·19 claims
- 1634US4330504AApparatus for making red phosphorusHOECHST AG·Filed 1981·Granted May 18, 1982·2 cites·4 claims
- 1733US4540558AProcess for removing organic contaminants from wet-processed phosphoric acidHOECHST AG·Filed 1984·Granted Sep 10, 1985·1 cites·4 claims
- 1833US4447400AMetering deviceHOECHST AG·Filed 1982·Granted May 8, 1984·3 cites·6 claims
- 1926US5618963AProcess for the preparation of sterically hindered hydroxybenzylphosphonatesCIBA GEIGY CORP·Filed 1995·Granted Apr 8, 1997·0 cites·17 claims
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